PLearn 0.1
|
00001 // PLearn ("A C++ Machine Learning Library") 00002 // Copyright (C) 2002 Pascal Vincent and Julien Keable 00003 // 00004 00005 // Redistribution and use in source and binary forms, with or without 00006 // modification, are permitted provided that the following conditions are met: 00007 // 00008 // 1. Redistributions of source code must retain the above copyright 00009 // notice, this list of conditions and the following disclaimer. 00010 // 00011 // 2. Redistributions in binary form must reproduce the above copyright 00012 // notice, this list of conditions and the following disclaimer in the 00013 // documentation and/or other materials provided with the distribution. 00014 // 00015 // 3. The name of the authors may not be used to endorse or promote 00016 // products derived from this software without specific prior written 00017 // permission. 00018 // 00019 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 00020 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 00021 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 00022 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00023 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 00024 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 00025 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 00026 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00027 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00028 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00029 // 00030 // This file is part of the PLearn library. For more information on the PLearn 00031 // library, go to the PLearn Web site at www.plearn.org 00032 00033 /* ******************************************************* 00034 * $Id: StrTableVMatrix.cc 5557 2006-05-10 20:36:58Z lamblin $ 00035 * This file is part of the PLearn library. 00036 ******************************************************* */ 00037 00038 #include "StrTableVMatrix.h" 00039 #include <plearn/base/stringutils.h> 00040 00041 namespace PLearn { 00042 using namespace std; 00043 00044 StrTableVMatrix::StrTableVMatrix() 00045 {} 00046 00047 00048 /* This contructor takes a StringTable (which is simply a matrix of string) and converts it to a matrix of reals 00049 using real->string and string->real maps 00050 */ 00051 StrTableVMatrix::StrTableVMatrix(const StringTable & st) 00052 : inherited(Mat(st.length(),st.width())) 00053 { 00054 map<string,real>::iterator it; 00055 double dbl; 00056 TVec<int> mapnum(st.width(),0); 00057 TVec<string> vec(st.width()); 00058 TVec<bool> hasreal; 00059 Vec colmax; 00060 hasreal.resize(st.width()); 00061 colmax.resize(st.width()); 00062 00063 for(int j=0;j<st.width();j++) 00064 { 00065 hasreal[j]=false; 00066 colmax[j]=0; 00067 } 00068 00069 map_sr.resize(st.width()); 00070 map_rs.resize(st.width()); 00071 00072 for(int j=0;j<st.width();j++) 00073 declareField(j,st.getFieldName(j), VMField::UnknownType); 00074 00075 // 1st pass to detect maximums 00076 for(int i=0;i<st.length();i++) 00077 { 00078 vec=st(i); 00079 for(int j=0;j<st.width();j++) 00080 if(pl_isnumber(vec[j],&dbl)) 00081 { 00082 hasreal[j]=true; 00083 if(!is_missing(dbl)) 00084 if(colmax[j]<dbl) 00085 colmax[j]=dbl; 00086 } 00087 } 00088 00089 for(int j=0;j<st.width();j++) 00090 if(hasreal[j]) 00091 mapnum[j]=(int)ceil((double)colmax[j])+1; 00092 00093 for(int i=0;i<st.length();i++) 00094 { 00095 vec=st(i); 00096 for(int j=0;j<st.width();j++) 00097 if(!pl_isnumber(vec[j],&dbl)) 00098 { 00099 if((it=map_sr[j].find(vec[j]))==map_sr[j].end()) 00100 { 00101 data(i,j)=mapnum[j]; 00102 map_sr[j][vec[j]]=mapnum[j]; 00103 map_rs[j][mapnum[j]]=vec[j]; 00104 mapnum[j]++; 00105 } 00106 else data(i,j)=it->second; 00107 } 00108 else data(i,j)=dbl; 00109 } 00110 00111 // We have modified the 'data' option. 00112 inherited::build(); 00113 00114 } 00115 00116 00117 void StrTableVMatrix::loadAllStringMappings() 00118 { 00119 // For a StrTableVMatrix, smap are already created 00120 return; 00121 } 00122 00123 00124 PLEARN_IMPLEMENT_OBJECT(StrTableVMatrix, "ONE LINE DESCR", "NO HELP"); 00125 00126 } // end of namespace PLearn 00127 00128 00129 /* 00130 Local Variables: 00131 mode:c++ 00132 c-basic-offset:4 00133 c-file-style:"stroustrup" 00134 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00135 indent-tabs-mode:nil 00136 fill-column:79 00137 End: 00138 */ 00139 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :